ABAP Select data from SAP table ISU2A_OPER_NON_HIST into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ISU2A_OPER_NON_HIST table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to ISU2A_OPER_NON_HIST. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the ISU2A_OPER_NON_HIST table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_ISU2A_OPER_NON_HIST TYPE STANDARD TABLE OF ISU2A_OPER_NON_HIST,
      WA_ISU2A_OPER_NON_HIST TYPE ISU2A_OPER_NON_HIST,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <ISU2A_OPER_NON_HIST> TYPE ISU2A_OPER_NON_HIST.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_ISU2A_OPER_NON_HIST.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM ISU2A_OPER_NON_HIST
  INTO TABLE IT_ISU2A_OPER_NON_HIST.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISU2A_OPER_NON_HIST
*  INTO TABLE @DATA(IT_ISU2A_OPER_NON_HIST2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_ISU2A_OPER_NON_HIST INDEX 1 INTO DATA(WA_ISU2A_OPER_NON_HIST2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_ISU2A_OPER_NON_HIST ASSIGNING <ISU2A_OPER_NON_HIST>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISU2A_OPER_NON_HIST>-OPERAND = 1.
<ISU2A_OPER_NON_HIST>-OPTYP = 1.
<ISU2A_OPER_NON_HIST>-MASS = 1.
<ISU2A_OPER_NON_HIST>-RUNDUNG = 1.
<ISU2A_OPER_NON_HIST>-RUNDART = 1.

ENDLOOP.

LOOP AT IT_ISU2A_OPER_NON_HIST INTO WA_ISU2A_OPER_NON_HIST.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISU2A_OPER_NON_HIST-GEWKEY, sy-vline,
  WA_ISU2A_OPER_NON_HIST-DEMAND_AS_IS, sy-vline,
  WA_ISU2A_OPER_NON_HIST-LEISTALL, sy-vline,
  WA_ISU2A_OPER_NON_HIST-PEAK_NO, sy-vline,
  WA_ISU2A_OPER_NON_HIST-SEASONFLAG, sy-vline,
  WA_ISU2A_OPER_NON_HIST-KONZIGR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISU2A_OPER_NON_HIST you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_ISU2A_OPER_NON_HIST TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_ISU2A_OPER_NON_HIST INTO WA_ISU2A_OPER_NON_HIST.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit CUNIT, internal->external for field MASS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ISU2A_OPER_NON_HIST-MASS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISU2A_OPER_NON_HIST-MASS.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_ISU2A_OPER_NON_HIST_STR, 
OPERAND TYPE STRING,
OPTYP TYPE STRING,
MASS TYPE STRING,
RUNDUNG TYPE STRING,
RUNDART TYPE STRING,
GEWKEY TYPE STRING,
DEMAND_AS_IS TYPE STRING,
LEISTALL TYPE STRING,
PEAK_NO TYPE STRING,
SEASONFLAG TYPE STRING,
KONZIGR TYPE STRING,
FRAN_TYPE TYPE STRING,
TIME_REL TYPE STRING,
PRORATE1 TYPE STRING,
PRORATE2 TYPE STRING,
PRODATE TYPE STRING,
RTPOPERAND TYPE STRING,
PRORATE_DAILY TYPE STRING,
OPINTIME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISU2A_OPER_NON_HIST_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_ISU2A_OPER_NON_HIST_STR-OPERAND sy-vline 
WA_ISU2A_OPER_NON_HIST_STR-OPTYP sy-vline 
WA_ISU2A_OPER_NON_HIST_STR-MASS sy-vline 
WA_ISU2A_OPER_NON_HIST_STR-RUNDUNG sy-vline 
WA_ISU2A_OPER_NON_HIST_STR-RUNDART sy-vline 
WA_ISU2A_OPER_NON_HIST_STR-GEWKEY sy-vline 
WA_ISU2A_OPER_NON_HIST_STR-DEMAND_AS_IS sy-vline 
WA_ISU2A_OPER_NON_HIST_STR-LEISTALL sy-vline 
WA_ISU2A_OPER_NON_HIST_STR-PEAK_NO sy-vline 
WA_ISU2A_OPER_NON_HIST_STR-SEASONFLAG sy-vline 
WA_ISU2A_OPER_NON_HIST_STR-KONZIGR sy-vline 
WA_ISU2A_OPER_NON_HIST_STR-FRAN_TYPE sy-vline 
WA_ISU2A_OPER_NON_HIST_STR-TIME_REL sy-vline 
WA_ISU2A_OPER_NON_HIST_STR-PRORATE1 sy-vline 
WA_ISU2A_OPER_NON_HIST_STR-PRORATE2 sy-vline 
WA_ISU2A_OPER_NON_HIST_STR-PRODATE sy-vline 
WA_ISU2A_OPER_NON_HIST_STR-RTPOPERAND sy-vline 
WA_ISU2A_OPER_NON_HIST_STR-PRORATE_DAILY sy-vline 
WA_ISU2A_OPER_NON_HIST_STR-OPINTIME sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.